Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents the pinnacle of precision tuning, featuring a refined 1:18 gear ratio that ensures velvet-smooth and exact pitch adjustment. Setting the global benchmark for closed tuners since 1966, this upgraded model combines classic heritage with modern CNC-milled engineering and self-locking drive mechanics for unrivaled tuning stability.
Crafted with premium high-grade brass string posts engineered seamlessly into the housing, each tuner provides wear-free operation and maximum acoustic transfer. The innovative stepped M6 flanged washer centers the string post securely through the banjo bolt, eliminating tilt torque and protecting against stress without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease for completely maintenance-free performance, the M6 90 maintains the identical installation dimensions of its predecessor for effortless, modification-free retrofitting. Precision surface finishes and robust construction deliver lasting reliability for demanding players.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Product Weight | 0.79 lb |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Post Material | High-Grade Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
| Washer Type | Stepped M6 flanged washer |
